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<title>pthread_condattr_getpshared</title>
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The Single UNIX &reg; Specification, Version 2<br>
Copyright &copy; 1997 The Open Group

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<h4><a name = "tag_000_007_1306">&nbsp;</a>NAME</h4><blockquote>
pthread_condattr_getpshared, pthread_condattr_setpshared 
- get and set the process-shared condition variable attributes
</blockquote><h4><a name = "tag_000_007_1307">&nbsp;</a>SYNOPSIS</h4><blockquote>
<pre><code>

#include &lt;<a href="pthread.h.html">pthread.h</a>&gt;

int pthread_condattr_getpshared(const pthread_condattr_t *<i>attr</i>,
    int *<i>pshared</i>);
int pthread_condattr_setpshared(pthread_condattr_t *<i>attr</i>,
    int <i>pshared</i>);
</code>
</pre>
</blockquote><h4><a name = "tag_000_007_1308">&nbsp;</a>DESCRIPTION</h4><blockquote>
The
<i>pthread_condattr_getpshared()</i>
function obtains the value of the
<i>process-shared</i>
attribute from the attributes object referenced by
<i>attr</i>.
The
<i>pthread_condattr_setpshared()</i>
function is used to set the
<i>process-shared</i>
attribute in an initialised attributes object referenced by
<i>attr</i>.
<p>
The
<i>process-shared</i>
attribute is set to PTHREAD_PROCESS_SHARED
to permit a condition variable
to be operated upon by any thread that has access to the memory
where the condition variable
is allocated, even if the condition variable
is allocated in memory that is shared by multiple processes.
If the
<i>process-shared</i>
attribute is PTHREAD_PROCESS_PRIVATE, the condition variable
will only be operated upon by threads created
within the same process as the
thread that initialised the condition variable;
if threads of differing processes
attempt to operate on such a condition variable, the behaviour is
undefined.  The default value of the attribute is
PTHREAD_PROCESS_PRIVATE.
<p>
Additional attributes, their default values, and the names
of the associated functions to get and set those attribute values are
implementation-dependent.
</blockquote><h4><a name = "tag_000_007_1309">&nbsp;</a>RETURN VALUE</h4><blockquote>
If successful, the
<i>pthread_condattr_setpshared()</i>
function returns zero.
Otherwise, an error number is returned to indicate the error.
<p>
If successful, the
<i>pthread_condattr_getpshared()</i>
function returns zero
and stores the value of the
<i>process-shared</i>
attribute of
<i>attr</i>
into the object referenced by the
<i>pshared</i>
parameter.
Otherwise, an error number is returned to indicate the error.
</blockquote><h4><a name = "tag_000_007_1310">&nbsp;</a>ERRORS</h4><blockquote>
The
<i>pthread_condattr_getpshared()</i>
and
<i>pthread_condattr_setpshared()</i>
functions may fail if:
<dl compact>

<dt>[EINVAL]<dd>
The value specified by
<i>attr</i>
is invalid.

</dl>
<p>
The
<i>pthread_condattr_setpshared()</i>
function may fail if:
<dl compact>

<dt>[EINVAL]<dd>The new value specified for the attribute
is outside the range of legal values for that attribute.

</dl>
<p>
These functions will not return an error code of [EINTR].
</blockquote><h4><a name = "tag_000_007_1311">&nbsp;</a>EXAMPLES</h4><blockquote>
None.
</blockquote><h4><a name = "tag_000_007_1312">&nbsp;</a>APPLICATION USAGE</h4><blockquote>
None.
</blockquote><h4><a name = "tag_000_007_1313">&nbsp;</a>FUTURE DIRECTIONS</h4><blockquote>
None.
</blockquote><h4><a name = "tag_000_007_1314">&nbsp;</a>SEE ALSO</h4><blockquote>
<i><a href="pthread_condattr_init.html">pthread_condattr_init()</a></i>,
<i><a href="pthread_create.html">pthread_create()</a></i>,
<i><a href="pthread_mutex_init.html">pthread_mutex_init()</a></i>,
<i><a href="pthread_cond_init.html">pthread_cond_init()</a></i>,
<i><a href="pthread.h.html">&lt;pthread.h&gt;</a></i>.
</blockquote><h4>DERIVATION</h4><blockquote>
Derived from the POSIX Threads Extension (1003.1c-1995)
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Copyright &copy; 1997 The Open Group
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